The fun begins Dec. 20 at 8 p.m. ET (save the date by joining our Facebook event), as BlogTalkRadio Co-Founder and CEO Alan Levy celebrates 2012 by welcoming an all-star lineup to chat about their shows, what’s next in 2013 and take live callers.

ASK AWAY: Got a question you’ve always wanted to ask our CEO or one of our featured hosts on the show? Join our Facebook event to save the date and tune in online or by dialing (866) 691-7714. Don’t miss it!

Christina Aguilera: The 4-time Grammy-winner drops in to chat about her big-screen debut, in Burlesque. Co-starring Cher, the flick casts Christina—who tells Punch Drunk Critics’ John Nolan, “I’m a little O.C.D.”—as a small-town waitress with a big voice who follows her dreams to an L.A. nightclub.

John Rzeznik: The Goo Goo Dolls frontman and the band’s bassist, Robby Takac, join Milling About’s Robin Milling at NYC’s Roseland Ballroom to chat about their latest CD, Something For The Rest of Us. (Be sure not to miss John’s a cappella rendition of Happy Birthday for birthday girl Robin.)

Natalie Portman: Star Wars’ Queen Amidala reveals how she trained as a ballerina for the Darren Aronofsky-directed thriller Black Swan, which opens tomorrow. “We were swimming a mile a day,” she tells Keeping It Reel host Tim Gordon. “And we were toning so that my body could look like a dancer’s.”

Spike Lee: The director spends a full hour with The Knicks Blog host Anthony Donahue, chatting about his hometown team. And when asked if he was upset that the Knicks didn’t land LeBron James, Spike says no—“Because if somebody doesn’t want to be here, then you don’t want them.”

Sally Kellerman: M*A*S*H’s Hot Lips Houlihan, whose new CD is titled Sally, recalls making the TV film Murder Among Friends with the late Leslie Nielsen—who teased her with fake flatulence. “That really headed him into the comedic part of his career,” she tells Milling About host Robin Milling.

John Roberts: As the 30th anniversary of John Lennon’s death— Dec. 8—approaches, CNN anchor John Roberts drops in on Film Festival Radio‘s Janice Malone to preview the network’s new documentary, Losing Lennon: Countdown to Murder, which premieres Saturday, Dec. 4 at 8pm ET.

Suze Orman: The host of CNBC’s The Suze Orman Show drops in to discuss the revised version of her New York Times bestseller The Road to Wealth. “If you define yourself by you possessions,” she tells host Philippe Matthews, “you are nothing more than a financial liar.”

Soledad Obrien: The CNN anchor drops in on Afronerd Radio host Desmond Burton to discuss her new memoir The Next Big Story: My Journey Through the Land of Possibilities, which fellow network star Anderson Cooper calls “A fascinating behind-the-scenes look at reporting.”

Coco Crisp, : The ace Oakland A’s center fielder—who helped lead his previous team, the Boston Red Sox, to victory in the 2007 World Series—stops by The Bottom Line Sports Show to chat with hosts Gerald Brown and Jonathan Foy about the current MLB season.